eaton



14 Sheets-Sheet --1.

A. 1). NEAL & H. F. EATON. PRINTING. TELEGRAPH.

No.48'7,229. Patented Nov. 29, 1892.

(No Model.)

THE mums FEYERS c0, PHOTG-LKTHO wAsHwu'mN. c. c.

(No Modiel.) 14 Shets-Sheet 2.

A. D. NEAL & H. F. EATON.

' PRINTING TELEGRAPH.

No.487,229. Patented Ndv. 29,1892.

Do I 30 oouoocooooooocoo m: Nonms PETERS co PHOTO-LIT!!!" wAsn-lmmdu, u.c.

(No Model.) 14 Sheets-Sheet 3.

A. D. NEAL & H. F. EATON.

PRINTING TELEGRAPH.

No. 487,229. Patented Nov. 29, 1892.

CZZZer Model.) 14 Sheets-Sheet 4; A. D.'NEAL 80 H. F. EATON.

PRINTING TELEGRAPH.

u Patented Nov. 29, 1892.

j wend ars 025w"? WM THE Nonms virus 00. wmuumo" WASHINGTON. n, c.

(No Model.) r 14 Sheets-Sheet 5.

A. 1). NEAL & H. P. EATON. PRINTING TELEGRAPH No. 487,229. Patented Nov.29, 1892.

(No Model.) 14 Sheets-Sheet 6. A. D. NEAL & H. P. EATON. PRINTINGTELEGRAPH.

N0. 487 Z 9. P tented NOV. 291392.

. i2 FE ark v ibwwrdjfl' (No Model.) 14 Sheets-Sheet 7.

A. D. NEAL 85- H. P. EATON.

PRINTING TELEGRAPH.

Patented Nov. 29, 1892.

(No Model.) 14 Sheets-Sheet 8.

A. D. NEAL 8: E. F. EATON. PRINTING TELEGRAPH. No. 487,229. PatentedNgv. 29, 1892; *1 1, L, ,;L R W H Q M Q. if war-QB 0.7M W 7 Atzya.

(No Model.) 14 Sheets-Sheet 9.

A. 1). NEAL-8v H. P. EATON.

PRINTINGTELEGRAPH.

Patented Nov. 29, 1892.

(lio ModeL) 1-4 Sheets-Sheet 10. A. D. NEAL & 'H. P. EATON.

PRINTING TELEGRAPH.

x A. H, \I

I We V No Model.) 14 Sheets Sheet 11.

A. D. NEAL & H. F. EATON.

PRINTING TELEGRAPH.

No 487,229. Patented Nov. 29. 1892.

Ewan/6713 THE NCRRIS Pzrzns co PHcrro-u'ma, WASHINGTON, u. c.

{No Model.) 14 sheet -sheet 13.

A. D. AL 8v H. I. EATON.

TING TELEGRAPH.

No. 487,229 Patented Nov. 29, 1892 -(No maael y' 14 Sheets-Sheet 14.

A. D. NEAL & H. P. BATON.

PRINTING TELEGRAPH.

No. 487,229. Patented Nov. 29, 1892.

jaw

r NORRIS Pzrzns cu, moron? r a rmen TATES aren't t rrent ALBERT D. NEAL,OF BOSTON, AND HOWARD F. EATON, OF QUINCY MASSACHUSETTS; SAID EATONASSIGNOR TO SAID NEAL.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 487,229, dated November29, 1892. Application filed A ril 21, 1891. Renewed October 10, 1892.Serial No. 448,301. (No model.)

To aZZ whom it may concern.-

Be it known that we, ALBERT D. NEAL, of Boston, county of Suffolk, andHOWARD F. EATON, of Quincy, county of Norfolk, State of Massachusetts,have invented an Improvement in Printing-Telegraphs, of which thefollowing description, in connection with the accompanying drawings, isa specification, like letters and figures on the drawings representinglike parts.

The type-writer for intercommnnication to be herein described containsas an element thereof a type-writer, the type-writer being capable, bymeans which will be hereinafter described, for use not only as anordinary office type-writer, but also as a transmittinginstrument tooperate one or more like typewriters at a distance, or to be putintoacondition of receptivity as a receiver of a message from a distantstation. "Each type or character used in printing is under the controlof a magnet of local circuit, which magnet is excited at the propertime, and by or through suitable mechanisms, acting, preferably, througha key-lever, effects the putting into position of the desired characterto be printed.

In our experiments we have ascertained that atype-writing machine of theHammond variety-such as represented in-United States Patent No.290,419-is best adapted for the work above outlined, and therefore wehave in the embodiment of our invention herein contained shown ourimprovements as incorporated with the so-called Hammond typewriter; butit will be obvious to thoseskilled in the art that some parts of ourinvention with but slight mechanical changes and adaptations may bereadily applied to other similar or suitable forms of type-writers, sothat our invention is not to be construed in every I instance sonarrowly as to exclude therefrom other type-writers than those of theHammond form; but the Hammond machine has some great advantages overothers, among which is the fact that all the characters to be printedare mounted upon a plate or character-carrier, which is moved by thedepression of a key-lever to place the character corresponding to thekey-leverdepressed opposite or in line with the hammer, a single hammerbeing used on the machine.

The Hammond machine contains two like type or character carriers.

Our apparatus has been devised in such manner that for short distances,Where great accuracy is required and speed desired, there is a separatewire for each character, the said wires being collected in a cable.

To bring into effect the cable, we have provided a series of cable-keysand circuit-controllers arranged in aseparate partof the machine andeach key being put under theconirol of one of the usual type or keylevers of the type-writing machine, the said type or key levers beingutilized by the operator when sending a message; but if a machine is toreceive a message the cable-keys co-operating with itare thrown out ofoperative position, so as not to interfere with the movements of theusual type or key levers by the magnets of the receiving-machine,actuated, however, from a distant station. The key-levers are marked todesignate the particular type-characters which they will, when actuated,cause to be displayed in a printed line, and hence said leversconstitute what may be called character-levers.

Each apparatus or instignment, as we shall sometimes designate thetype-writer, with the adjuncts added by us, has as a cooperating part ofit a continuously-rotating selecting-drum and a circuit-selecting armrotating in unison therewith, and when but one wire is to be usedbetween stations thesending-operator when he arrests the rotation of thesaid drum will arrest the rotation of the circuit-selecting arm at thereceiving-station, so that. said arm Will close a local circuit at thereceiving-station and effect the putting into position at theprinting-point of the receiving-machine the character to be printed,said character corresponding with the character predetermined at thesending-station.

While the message is being sent from the 9 sending-station, thecircuit-selecting arm at the said station will rotate, but it will notoperate the local magnets at the sending-sta tion, for at such time asuitable switch, to be described, will be moved to open theoperating-circuit in which said local magnets are contained.

Our improved apparatus may be readily changed from the cable system tothe one-Wire system, and vice versa, as desired, the same machines beingutilized in both cases.

\Ve have combined with the carriage holding the paper being printed uponmeans whereby the said carriage may be returned automatically to itsstarting-point, said mechanism being started my means of acircuitcontrolling key forming part of a normallyopen circuit. The meansfor producing this return movement of the carriage may either be anelectromotor or an electromechanical motor having a sprin During thisreturn movement of the carriage and before the carriage completes theend of its return stroke the current of the motor is checked or cut off,so that the carriage comes to rest without any injurious jar.

We have devised a combination-switch and placed it in circuit with thetype-writers, the said switch having what we denominate general andspecial contacts, the general contacts being used for general or publicWork and the special contacts being employed by special subscribers forsecrecy between themselves. Vhen the combination-switches of theinstruments are set with the general contacts closed, all the machinesin receptive position, and having the circuits closed, the generalcontacts will receive the general messages as sent; but when any two ormore subscribers desire secrecy upon notice each will set hisinstruments with the combination-switches on special contacts common toonly the said particular subscribers and the sending-operator willmanipulate his keys just as when sending a general message; but themessage sent by him can be read only on the particular machines havingthe same special contacts, all other machines if in receptive conditionreceiving a jumble of letters or an unintelligible message. Anytwo ormore subscribers may have special contacts arranged in a special mannerfor theirown use, and when their instruments are set for special work noother subscribers can get the message intelligible.

An instrument of one subscriber may have a special series of contactsfor a second subscriber, and yet another special series of contacts foryet a third subscriber; but the special contacts of the second-and thirdsubscribers will not be alike.

Figure 1 is a side elevation andsection of one form of anelectromechanical type-writing apparatus embodying this invention, thesection being supposed to be taken on the line 00 at, Fig. '7, lookingin the direction of the arrow 2. Fig. 2 is a detail in side elevation ofa pole-changing apparatus shown in Fig. 1 and to be hereinafter referredto; Fig. 3, a top or plan view of the apparatus shown in Fig. 2; Fig. 4,details of parts of the polechanger and its operating-wheel shown inFig. 2 on an enlarged scale; Fig. 5, a detail to more clearly show thecircuits of the polechanger; Fi 6, a modification to be referred to, itshowing an independent motor for rotating the selecting-drum. Fig. 7 isa top or plan view of the magnet-containing case and the parts locatedtherein and shown in Fig. 1. Fig. 8 is a detail of the batterycontrolling switch shown in Fig. 7 and to be hereinafter described. Fig.9 is a rear side elevation and section of the apparatus shown in Fig. 1,the section being supposed to be taken on the irregular linecc 50',Fig. 1. Fig. 10 is a detail, on an enlarged scale, of the deviceemployed to rotate the printing cylinder to obtain spaces between thelines; Fig. 10, a detail of the actuating-pawl for rotating theprinting-cylinder. Fig. 11 is a detail of a circuitcontroller to governthe return movement of the carriage. Fig. 12 is a diagram of circuits tomore clearly show the operation of the apparatus. Fig. 12 is a detail tobe referred to; Fig. 13, 'a diagram of circuits, showing threeinstruments connected together and arranged for intercommunication bymeans of a single wire; Fig. 13 and Fig. 13 details of apparatusemployed in the one-wire system; Fig. 13", a diagram of circuits used inthe onewire system; Fig. 13 a detail of switches to be referred to; Fig.14:, a diagram of circuits, showing parts of the apparatus connectedtogether for intercommunication by a plurality of wires, to behereinafter designated as the cable system. Fig. 15 is a detailpartially broken out and on an enlarged scale of one form ofindividualizing deviceor combinationswitch; Fig. 16, a detail showing amodified form of individualizing device or combination-switch. Fig. 17is a detailof the circuitselecting device employed when the machine isused on the one-wire system; Fig. 18, a'detail of the circuit-controlleror switch for the call-bell; Fig. 19, a detail of the switch employed tocontrol the backward movement of the carriage in the cable system; Fig.20, a diagram of circuits to more clearly illustrate the operation ofthe individualizing device or combination-switch; Fig. 21, a diagram ofcircuits shown in Fig. 20 with the combination-switch in a differentposition to obtain a different combination, as for special or privatesignaling over the same wires. Fig. 22 is a diagram of circuits,represent-ing three instruments or stations connected in circuit inaccordance with the cable system; Fig. 23,

a plan view, enlarged and partially broken out of the box containing thecircuit-controllers, adapted to be operated by the type keys or leversshown in Fig. 1; Fig. 24, a section.

through the box shown in Fig.28 on the line y y looking toward theright; Fig. 25, a detail of a circuit-controller which in practice isoperated by a key. Fig. 26 is a sectional detail, on an enlarged scale,to more clearly show the mechanism for controlling the battery-circuit,the section being supposed to be taken on the line 00 Fig. 27; Fig. 27,a sectional detail on an enlarged scale, the section being supposed tobe taken on the line 00 Fig. 26; Fig. 28, a detail to be referred to;Fig. 29, a detail, on an enlarged scale, of a part of the printingmechanism of the type-writer; Fig. 30, a detail of the detachablereinforcing-plate to be referred to; Fig. 31, a perspective view of amotor mechanism shown in Fig. 1 for operating the carriage and theselecting-drum; Fig. 32, a sectional detail of the form of clutchmechanism shown in Figs. 1 and 31 to couple the armature-shaft with thecarriage; Fig. 33, a side elevation of a modified form of apparatus withthe magnetcontaining case in section, the mechanism being actuated by anelectrically-controlled drum; Fig. 34, a detail in elevation of acircuit-indicating device attached to the apparatus and shown in Figs. 1and 33; Fig. 35, a sectional detail of the indicating device shown inFig. 34, the section being supposed to be taken on the line y y, lookingtoward the left. (See Fig. 34.) Fig. 36 is a detail to be referred to,showing some of the buttons or keys used on the one-wire system. Fig. 37is a top or plan view of the apparatus shown in Fig. 33; Fig. 38, adetail of the motor mechanism shown in Figs. 33 and 37; Fig. 39, adiagram of circuits, representing two central stations or citiesconnected in accordance with the one-wire system and the instruments inthe said cities joined to the central offices by the cable system; Fig.40, a sectional detail of one form of circuit connection or switchboardused to couple two instruments together; Fig. 41, a detail representingtwo instruments coupled together on the cable system; Fig. 42, a detailof the one-wire system to be referred to; Fig. 43, a diagram of circuits to represent the manner of connecting the electric motors of thevarious instruments; Fig. 44, a section of the carriage on the line 0000 Fig. 9; Fig. 45, a detail of the rack-bar of the carriage and drumoperating the same.

In illustrating our invention we have shown the principal parts of theHammond machine usually found in the market; but we have not consideredit necessary to show all the parts thereof, as the said machine is wellunderstood.

In the drawings, A represents a bed-plate, A its feet, and aa type orcharacter carrier, (see Fig. 29,) it having upon it the characters to beprinted. This character-carrier is herein represented as forming part ofa segmental arm mounted loosely upon and to rotate freely about acentral stud a.

In practice there are two type or charactercarriers in each type-writer.The hub of each character-carrier has suitable pins or teeth a which areengaged by the toothed inner end of a lever a having a slot a which isentered by an arm a of arock-shaft c0 having a second arm (L12 providedwith an adjustable arm a There is a rock-shaft a a rock-shaft a and arma for each charactercarrier. The type-keys or character-levers dprovided at their outer ends with suitable buttons representing lettersor figures corresponding with the type-characters of the type orcharacter carrier, have their fulcra on knifeedges a of a block a,properly secured in practice to the bed of the machine. The inner endsof the levers are kept separated by a slotted comb-like guide a, formingpart of the bed-plate, and the inner end of each lever terminates underone of the series of vertically-reciprocating pins or rods a, providedwith suitable collars a acted upon by suitable springs a which normallykeep the said pins or rods down, each lever (1,13 also when moved actingupon the arm a above it to thus effect the movement of the lover a andthe vibration of the character-carrier a. The center pivot a contains astop-lever a which as a character-carrier is oscillated, as described,acts upon and moves the said stoplever with it until its outer end a isarrested by one or the other of the pins or rods c which may be liftedby the particular key then depressed, the said rods or bars acting asstops, and as one or the other is raised to stop the lever a" one oranother character of the character-carrier is left in position oppositethe hammer a said hammer being actuated to strike a pad e which supportsthe rear side of the paper to be printed on opposite the usualink-ribbon c0 and opposite the particular character to be printed. Theinkribbon e is taken from one to the other of the reels a, mounted eachupon a suitable shaft a having its bearings in like holes (1 one formedin an ear of the top plate a and the other in the feet a of the bottomplate a, in which the pins or rods a reciprocate.

Each shaft a is provided with a suitable worm-pinion 01, which isengaged and rotated intermittingly by a worm (L25 on a shaft a, saidshaft having upon it a suitable ratchet-wheel a which derives its motionfrom a pawl e on a suit-able rock-shaft piv at a and moved by thekey-lever.

The framework a of the carriage has connected to its under part a rack00 This carriage contains a pair of rolls a and a between and by whichthe paper is fed in the direction of its length, the roll 61, beingsimply a pressure-roll. The roll 0. has at one end a suitable ratchet al(see Figs. 9 and 10,) which is engaged by a pawl (Z carried by apawl-carrier d mounted loosely on one journal of the said roll, the saidpawl-carrier being notched at one end to be engaged by the projection ofa lever c1 mounted on a suitable shaft d in a bearing (1 The rack-bar ais engaged and rotated by external teeth of a drum a containing aspring, the said drum and spring being permitted to act Whenever thedetent c1 is released from the ratchet-wheel 01 The devices so fardescribed and referred to and lettered are common to the Hammondtype-writer. We will now describe the altera tions and additions whichwe have made thereto and the means which we have devised for operatingthe said type-writer as a telegraphic transmitter and permitting it tobe actuated as a telegraphic receiving-instrument.

To avoid wear of the upper plate a of the framework of thetype-writer,we have added thereto a reinforcing-plate on which thestop-lever a" travels, and as the said plate becomes worn we may readilyreplace it by another one. The legs A of the type-writer, as representedherein, are set into suitable cup-bearings A supported in suitablemanner upon or within a box or case A containing a series ofelectro-magnets b, one magnet for each lever or character-key of thetype-writer. Each magnet, as herein represented, is composed of twocoils and has cooperating with itan armature b, operatively connectedwith the character or type carrier, through the movement of which andsuitable intermediate devices the character to be printedwill be broughtinto printing position. In this embodiment of our invention, asstated,the characters are on a charact-er-carrier (shown as a segmentalplate) and each armature pivoted atb is connected by a suitable link, asb to an elbow-lever I), having itspivot upon a rod mounted loosely on arod b extended across the box or case A. Each elbow-lever b has pivotedto it a link 1), which is extended up through the top of the box or caseand through a hole in a suitable guidebar b secured to or forming partof the casting or bar b slotted for the reception and guidance of thekey-levers, each link 19 be- 1 ing connected at its upper end with oneof said key or character levers, the link having,preferably at its upperend, a hook to fit over or embrace a part of the said lever, so thatwhen a lever b is moved by the attraction of the armature of a magnetthe link connected with the armature so moved will turn a lever 11 anddepress or pull down a key-lever, the keys actuating the pins or rodsand other devices all in manner usual or common to the Hammondtype-Writer, to thereby place in position the desired character on thecharacter carrier. The contacts b 6 as herein shown, are arranged in asubstantiallyvertical line with and separated from each other byinsulation 9 (see Fig. 24,) so that in the movement of a pen or wiperfrom one contact-plate, as b", to the other contact-plate b a dead-breakis made in the circuit. The contact-plate b, as shown, is arranged atone side the contact-plates I) I2 and is located substantially near thebottom of the contactplate carrier I), so that when the pen or wiper bis in contact with the contact-plate b the pen or wiper Z2 will be incontact with the plate b Each cable-circuitcontrolling lever 79 (seeFig. 24:) is held up by a suitable spring b secured to the bottom of thecase A and having its free end bearing against the under side of thesaid lever. The levers b are adapted to and may be moved downwardsimultaneously, preferably by means of a camshaped depressor Z9 attached:to a shaft Z9 supported. in suitable bearings within the case A andextended across the said case, the said depressor Z9 constituting whatwe shall hereinafter in some instances designate as a circuit-controlleractuator. The depressor will preferably be moved by means of a lever Z9fast on a short shaft 6 having bearings in the case A and in an uprightb and having fast on it a segmental gear 19 in mesh with a pinion Z1mounted on a stud or arbor 5 (see Figs. 26 and 27,) the said pinionmeshing with a segmental gear Z9 on the shaft I9 The lever Z7 hassecured to it a locking device, herein shown as a rod 5 adapted toengage a notch 19 in a metal plate or segment 19 and to enter notches Z919 in a plate 19 of insulating material, the plate Z9 and the insulatedplate 6 being secured to the side of the box or case A the said plate bbeing secured to the plate 19 for a purpose as willbe described. 17pivoted, as at b, in lugs or ears h on the lever b the lever 11 having asubstantially-long arm 19 by which the said lever may be turned on itspivot to withdraw the locking-bar 12 from one of the notches. The

lockingbar is extended through suitable guiding lugs or studs Z7 17, andbetween the said lugs or studs the locking-bar is encircled by a spring12 one end of whichpresses against the lug 19 and the other against acollar Z3 fast on the bar, the said spring normally acting to press thelocking-bar into engagement with one of the notches referred to.

Each circuit-controlling lever 19 has eo-opcrating with it a spring b(see Figs. 1 and 24,) to which is connected a Wire h leading to thebattery, (see Figs. 12 and 14.), another wire leading to the batterybeing connected to the spring 19 The shaft b (see Figs. 26 and 27) hasmounted upon it a drum 0, of insulating material, provided with twostrips 0 0 (see Fig. 8,) extended around the periphery of the drum 0preferably a little over halfway, and the said drum of insulatingmaterial is also provided with acontacting strip 0 extended axiallyacross the drum, for a purpose as will be described. The drum 0 hasco-operating with it contact pens or brushes 0 0 located, as hereinshown, below the drum, and contact pens or brushes 0 0 located above thedrum, the upper and lower brushes being connected electrically by theconducting-strips c 0 when the latter in the revolution of the drulnarebrought into contact with the said brushes, the upper brushes beingelectrically connected at other times by the strip 0 The drum 0, itscontact-strips, and the pens and brushes co-operating therewithconstitute one form of transforming-switch or circuit-controllingdevice, by which the instrument may be easily changed from a transmitterto a receiver, and vice versa, and from either to a mechanicaltype-writer, as will be The rod 11 is jointed to a lever described. Thecontact pen or brush is connected in circuit with the brushes 11 (seeFig. 14,) and the contact-pen c is connected in circuit with the lowersprings 19 while the contact-springs c c are connected in circuit, aswill be described, with the opposite sides of the battery. The drum 0and its contactstrips 0' c 0 form, with their cooperating pens orbrushes, one form of a circuit-controlling device or switch for thebattery, whereby the latter may be out out and the line closed tocomplete the circuit through the magnets, in order that the machine maybe used as a receiver and the key-levers be electro-mechanicallyoperated through the armatures of the magnets, as will be described. Thedrum a which by its contained spring rotates the carriage (r in aforward direction, has external teeth which mesh with a pinion mountedon a shaft 0 having hearings in an upright 0 the said shaft havingloosely mounted upon it a gear-wheel e in mesh with a beveled pinion eon the armature shaft 0 of an electromotor A which may be of any usualor well-known construction, the

said armature-shaft having mounted upon it a commutator 0 with whichco-operate brushes 0 secured to brushholders 0 0 to which the line-wiresare oonnected,as will be described.

The circuit of the electromotor is preferably controlled, as hereinshown, by means of a carriage-key 0 (see Fig. 19,) extended through asuitable box or hub (see Fig. 1) on the top of the auxiliary box A andpro- Vided at its lower end with a contact-block 0 adapted to beinserted between contact members 0 0 of the switch controlling themotor.

The motor mechanism is designed to be utilized to restore the carriageto its normal or starting position after it has reached the end of itsforward feed or movement in the direction of the arrow 200, Fig. 9,and-in order that the armature of the electromotor may not bemechanically rotated during the normal working of the apparatus by thedepression of the key-levers a we have mounted the bevel-gear c looselyon the shaft 0 and provided a clutch mechanism,constructed as will bedescribed, whereby the said bevelgear is rendered fast on the shaft 0when the circuit of the electromotor is completed. The clutch mechanismwhich we prefer is constructed substantially as shown in Figs. 1, 31,and 32, and consists, essentially, of a disk 0 made fast on the shaft 0as by the key or pin 0 and provided on its inner face with a series ofteeth or notches 0 with which cooperate one or more pins or projections0 which are extended loosely through suitable holes in the beveled gear0 and are secured to a disk a, loosely mounted upon the shaft 0, thedisk 0 having secured to or forming part of it a hub 0 provided withspiral or cam-shaped grooves 0 which are adapted to embrace or to beentered by pins or lugs 0 secured to ears 0 extended from the uprightthe disk 0 being normally pushed away from the beveled gear 0 todisengage the pins or projections 0 from the teeth 0 on the disk 0 andto engage the spiral or camshaped groove 0 with the pins 0 by a spiralspring 0 encircling the shaft between the beveled gear 0 and the disk 0The pins 0 are beveled or inclined on their edges, as at 2, (see Fig.32,) so as to slip by the teeth 0 on the disk 0 when the beveled gear 0is rotated in one direction, for a purpose as will be described.

As represented in Fig. 32, the spiral or cam grooves c of the hub are inengagement with the pin 0 and the disk 0 is in its normal position, withthe pin 0 out of engagement with the teeth 0 of the disk 0 and themachine at such time is in condition tobe used in regular work withoutproducing rotation of the armature of the electromotor; but as soon asthe circuit of the electromotor is completed through thecarriage-controlling key 0 (shown in Fig. 19) the beveled pinion of thearmature-shaft is rotated in the direction of arrow 21 and the beveledgear 0 is rotated in the direction of the arrow 22, and as the beveledgear 0 is rotated in the direction of its arrow 22 the cam-hub 0 isrotated in the same direction and the said cam-hub is forced forward bythe pins 0 until the pins 0 are in engagement with the teeth 0 of thedisk 0 and when they are thus engaged with the teeth 0 the beveled gear0 is locked or clutched to the shaft 0 and the continued rotation of thebeveled gear will produce a rotation of the main drum c4 in a backwarddirection, and the carriage will thus be moved backward or in thedirection indicated by the arrow 30, Fig. 9, into its normal or startingposition.

In practice the carriage-controlling key 0 will be maintained closed asufficient length of time to enable the carriages of all the instrumentsincluded in circuit. with the particular instrument being used as atransmitter to be brought back to their normal or starting positionready to commence a new line.

In order to prevent jar or shock to the carriage, we have provided acircuit-controller for the electromotor, which is automatically openedby the carriage before the latter reaches the end of its backwardmovement, and the said circuit-controller is located on the machine, soas to be operated when the carriage has nearly reached the end of itsbackward movement, the momentum of the carriage carrying it to itsnormal or starting position. The circuit-controller for the motorreferred to (shown in Figs. 9 and ll) consists of a spring strip orplate (1, provided, preferably, with a contact-point d, which cooperateswith an upright 01 secured to an insulating-block d fastened to a backplate d,

secured to and forming part of the frame of the machine. Thecircuit-controlling device referred to is operated, preferably, by aprojection d adjustably secured in any suitable manner to a rod 61,fastened to the carriage, the said projection in the backward movementof the carriage striking the spring 61 and withdrawing its contact-pointd from engagement with the upright (1 opening the motorcircuit. 7

In order to automatically rot-ate the feedroll 01, to feed the paper andspace the same for a new line, we have provided a mechanism, (see Figs.1, 9, and 10,) which we will now describe. This mechanism, as shown,consists, essentially, of a mechanical switchcam 01 represented aspivoted at d to an upright plate d having secured to or forming part ofit, as herein shown, a guide-bar d forming, with a second bar (Z securedto a bottom plate 01 a passage 61 into which extends a roller 01 on anarm c1 pivoted to a crank d" on a shaft 61 having suitable bearings in alug d secured to or forming part of the carriage, the said shaft havingfast on it at its opposite end an elbow-lever d extended toward thecylinder 0, and engaging the forked end 01 of a pawl-carrier (Z looselymounted on the shaft of the cylinder a, and provided with a pawl 01 inengagement with the ratchet-wheel d fast on the shaft of the cylinder 05The arm or lever al is provided with a slot (1 into which is extended apin 61 on the crank-arm d", the said pin acting to hold the arm al inproper position, so as to cause the roller d to enter the passage (Z onthe forward movement of the carriage and to permit the said arm to belifted up by the switch d on the backward movement of the carriage.During the forward movement of the carriage, occasioned by thedepression of the key-levers, the roller d enters the passage d andpassing under the switch-cam d lifts the latter, and when on thecontinued forward movement of the carriage the roller (1 has cleared theswitch-cam d the latter drops into its normal position, (shown in Fig.10,) resting upon the bar (Z so that when the carriage is moved backwardthe roller 61 will travel up the inclined switch-cam d and:

turn the arm 01 of the lever (Z downward or in the direction of arrow35, Fig. 10, thereby rocking the plate 61 on the cylinder-shaft. andmoving the pawl (Z pivoted to said plate,,

into engagement with an adjacent tooth of the ratchet 01 so that whenthe roller 61 has' cleared the guide-bar 61 a spring on the pivot of theshaft d will throw the arm d downward and will move the arm 01 of thelever 01 in the direction opposite to that indicated by arrow 35,thereby carrying the forked end of the lever c1 upward and by means ofthe pawl d rotating the ratchet-wheel 61 the distance of one tooth, andthus rotating the cylinder one step, or the distance of one line.

Our improved instrument thus far described is designed to be used onwhat we designate as the cable'system, in which the magnets of oneinstrument are connected to corresponding magnets of another instrument.

Each instrument may be used as a mechanical type-writer, as atransmitter, and as a receiver.

When the instrument is used for office workthat is, as a mechanicaltype-writer the lever 11 is moved in the direction of arrow 60, Figs. 26and 28, and the locking-bar Z9 is made to engage with. the notch ortooth I), the machine at such time being cut out of the main-linecircuit, as will be described, with the exception of the call-bell,which is always in circuit with the other call-bells on the line. Thisfeature may be clearly understood by referring to Figs. 14: and 18.Referring to Fig. 18, the call-bell key is shown as constructed of ablock 9 of insulating material, to which is secured a stud or post 9,having a button 9 (marked Gall-Bell in said figure.) Theinsulating-block g has secured to it on one side, near its lower edge, acontact-strip g and above the said contactstrip the said block hassecured to it two independent contact-plates g 9 electrically connected,as by screws or pins g, to like contact-plates g g The rod g is extendedthrough a base block or plate g", to which are secured on opposite sidesof the insulatingblock g contact springs or brushes g g g. Thecontact-springs g 9 have connected to them line-wires 36 37, the latterhaving connected to it the magnet 9 for the call-bell g fastened to thefront of the machine, as shown in Fig. 1. The wire 37 is connected ortapped onto a common returnwire 37 at the point g". (See Fig. 14:.) Thecontact springs or brushes 9 9 have attached to them wires 34: 35,connected to battery-wires 34 35 at the points g 3g the wires 34 35being in circuit with the battery B. When it is desired to call from onestation, as B to another, as B, the call-bell button g in the station Eis depressed and the battery 13' in the station E is put into circuitthrough the contact-springs g g and plates 9 pins 9 contact-plates 9 andbrushes g {112, the wires 36 37, the call-bell in station 13 and wire37, extended to the station B The circuit of the call-bell is completedthrough the wires 36 37 brushes 9 g, and contact-strip g on theinsulating block 9 of the call-bell keyin the station B The bell g inthe station B will ring and notify the operator that station E wants tocommunicate with station I5 In Fig. 14 we have shown a diagram ofcircuits representing a sufficient number of magnets of two instrumentsto enable the adaptation of our improved instrument to the cable systemto be clearly understood. In the two stations marked B B (shown in Fig.14) we have represented only five magnets (marked, respectively, a 19 0d 6 corresponding to the keys of the instrument. In practice we preferto have the cable-wires separate from IIC

